Perhaps you should try some spelling variations:
thin zheng » chen zheng, qin zheng, things zhang
zheng rong » chen rong
time last » time list, time past, time lost
some past » some case, time past
rong ping » dong ping, ting ping
wang dan » wang yan, wang ban, wang yidan
dan yang » daun yang, tan yang, wang yang

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: wang dan yang ((time last) OR (some past)) thin zheng rong ping ;~.
• Adding a wildcard symbol may retrieve word variants: wang dan yang ((time last) or (some past)) thin zheng rong ping ;*.